Install a rbenv ruby version patched with the performance patches from rvm

railsexpress-patched-ruby-for-rbenv.sh

#!/bin/bash
# This script creates a custom ruby definition for rbenv
# which incorporates the rvm patches from skaes.
#
# (c) frank.schumacher.privat@gmail.com
#
rubyexpress_repo="https://github.com/skaes/rvm-patchsets.git"
rubybuild_repo="https://github.com/sstephenson/ruby-build.git"

mkdir rbenv-railsexpress
cd rbenv-railsexpress
rm -rf ruby-build
rm -rf rvm-patchsets
tmp_dir=$(pwd)

echo "Fetching repos"
git clone ${rubybuild_repo}
git clone ${rubyexpress_repo}
echo ""

for patch_dir in rvm-patchsets/patches/ruby/2.1.* rvm-patchsets/patches/ruby/1.9.* rvm-patchsets/patches/ruby/2.2.* rvm-patchsets/patches/ruby/2.3.* ; do
  patch_for_mri_version=${patch_dir##*/}
  ruby_build_file=$(ls -1 ruby-build/share/ruby-build/${patch_for_mri_version}* | grep -e "-p[0-9]\{3,\}$" | sort -n | tail -n 1)
  if [[ ! -f "${ruby_build_file}" ]]; then
    ruby_build_file="ruby-build/share/ruby-build/${patch_for_mri_version}"
  fi

  echo "Found railsexpress patches for MRI ${patch_for_mri_version} in ${ruby_build_file}"
  if [[ -f "${ruby_build_file}" ]]; then
    cp ${ruby_build_file} ${patch_for_mri_version}
    echo "# Apply railsexpress patches" > railsexpress.tmp
    echo "build_package_railsexpress() {" >> railsexpress.tmp
    echo "  echo 'Applying patches ...'" >> railsexpress.tmp
    for patch_file in ${patch_dir}/railsexpress/*; do
      echo "  patch -s -p1 < ${tmp_dir}/${patch_file}" >> railsexpress.tmp
    done

    echo "}" >> railsexpress.tmp
    echo "" >> railsexpress.tmp

    cat railsexpress.tmp ${patch_for_mri_version} | sed 's/ldflags_dirs/railsexpress ldflags_dirs/g' > ${patch_for_mri_version}-perf

    rm ${patch_for_mri_version}
    rm railsexpress.tmp

    echo "Install patched ruby with 'RUBY_CONFIGURE_OPTS=--with-readline-dir=\"$(brew --prefix readline)\" CONFIGURE_OPTS=\"--disable-install-rdoc\" rbenv install rbenv-railsexpress/${patch_for_mri_version}-perf'"
    echo ""
  fi
done

rm -rf ${tmp_dir}/ruby-build

echo ""
echo "After installing the patched ruby 'rm -rf ${tmp_dir}' will remove all remainders of this operation"

@thenoseman Thanks for this!